IMA 2003-019Na6Sr12Ba2Zr13Si39B4O123(OH)6 · 20 H2O

This species, under publication, was known as MSH UK-99. It is related to benitoite. More information to follow.

PHYSICAL CHARACTERISTICS:

Color is colorless to grey.Luster is vitreous.Diaphaneity is transparent.Crystal System is hexagonal; p63cm.Crystal Habits include (??).Cleavage: (??).Fracture is (??).Hardness is (??).Specific Gravity is approximately (??) g/cm3.Streak is (??).Associated Minerals include (??).Distinguishing Features: (??).Origin: Named for (??).